http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49688
--- Comment #12 from Bernd Schmidt <bernds at gcc dot gnu.org> 2011-07-14 21:21:15 UTC --- Just guessing now, but you might also want to try a different version of binutils - maybe there's a problem with .cfi directive handling? Or maybe this has just never been tested with an alpha gas due to the MIPS_DEBUGGING_INFO?